package com.spring.config;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

import javax.servlet.ServletContext;
import javax.servlet.ServletRegistration;

/**
 * @author Spring King
 * @date 2021/7/5
 */
public class BootWebApplicationInitializer implements WebApplicationInitializer {

    @Override
    public void onStartup(ServletContext servletContext) {
        // Load Spring web application configuration
        // 通过注解的方式初始化Spring的上下文
        AnnotationConfigWebApplicationContext ac = new AnnotationConfigWebApplicationContext();
        // 注册spring的配置类（替代传统项目中xml的configuration）
        ac.register(ApplicationConfig.class);
        ac.refresh();

        // Create and register the DispatcherServlet
        // 基于java代码的方式初始化DispatcherServlet
        DispatcherServlet servlet = new DispatcherServlet(ac);
        ServletRegistration.Dynamic registration = servletContext.addServlet("/", servlet);
        registration.setLoadOnStartup(1);
        registration.addMapping("/*");
    }
}
